AirHint found the following cheapest return flights from Boston (BOS) to Zurich (ZRH) in December 2025 (see full year).

Return flights

11 Dec - 15 Dec	Aer Lingus
08 Dec - 15 Dec	TAP
09 Dec - 15 Dec	TAP
25 Dec - 08 Jan	Scandinavian Airlines
25 Dec - 09 Jan	Scandinavian Airlines
25 Dec - 10 Jan	Icelandair
16 Dec - 30 Dec	Aer Lingus
08 Dec - 15 Dec	SWISS	direct
12 Dec - 21 Dec	Icelandair
13 Dec - 27 Dec	Aer Lingus
14 Dec - 20 Dec	Aer Lingus
23 Dec - 09 Jan	Aer Lingus
12 Dec - 21 Dec	SWISS	direct
21 Dec - 10 Jan	Aer Lingus
22 Dec - 31 Dec	Aer Lingus
25 Dec - 02 Jan	Scandinavian Airlines
11 Dec - 03 Jan	Scandinavian Airlines
24 Dec - 01 Jan	TAP
25 Dec - 09 Jan	SWISS	direct
25 Dec - 10 Jan	SWISS	direct

Also check the deals for one-way flights from Boston to Zurich in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Boston to Zurich in December from 373€

Return flights